阅读说明：本技术 一种-25℃超低温可降噪螺杆空气源热泵机组的控制系统 (Control system of-25 ℃ ultralow-temperature noise-reducing screw air source heat pump unit ) 是由 王泽富 刘吉福 卜伟强 季良坤 于 2020-12-30 设计创作，主要内容包括：本申请公开了一种-25℃超低温可降噪螺杆空气源热泵机组的控制系统,包括风机控制模块、PLC模块、通讯模块和电子膨胀阀模块,PLC模块包括CPU单元、模拟量单元和扩展模块单元,通讯模块和电子膨胀阀模块连接PLC模块。具有以下优点：解决了空气源热泵机组产生的噪音过大的问题,实现了空气源热泵机组供暖时的低噪音效果。(The application discloses-25 ℃ ultra-low temperature degradable screw air source heat pump set's control system, including fan control module, PLC module, communication module and electronic expansion valve module, the PLC module includes CPU unit, analog quantity unit and extension module unit, and communication module and electronic expansion valve module connect the PLC module. Has the following advantages: the problem of the too big noise that air source heat pump set produced is solved, low noise effect when having realized air source heat pump set heating.)

1. The utility model provides a control system of screw air source heat pump set that makes an uproar falls in-25 ℃ ultra-low temperature which characterized in that: the intelligent control system comprises a fan control module, a PLC module, a communication module and an electronic expansion valve module, wherein the PLC module comprises a CPU unit, an analog quantity unit and an expansion module unit, and the communication module and the electronic expansion valve module are connected with the PLC module.

2. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 1, wherein: the fan control module comprises an open-phase sequence protector XJ3-D, the open-phase sequence protector XJ3-D is connected with a U line, a V line and a W line of three power lines, the U line, the V line and the W line of the three power lines are connected with one end of a breaker QF1, the other end of the breaker QF1 is connected with one end of a breaker QF2, one end of a breaker QF3, one end of a breaker QF4, one end of a contactor KM1 switch and one end of a contactor KM3 switch, the other end of a contactor KM1 switch is connected with one end of a thermal relay FR1, the other end of the thermal relay FR1 is connected with one end of a press M1, and the other end of the press M1 is connected with the other end of the contactor.

3. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 2, wherein: the other end of the breaker QF2 is connected with an R pin, an S pin and a T pin of a frequency converter G1, a Dl1 pin of a frequency converter G1 is connected with a switch of a relay KA4, a Dl4 pin of a frequency converter G1 is connected with a switch of a relay KA6, a U pin, a V pin and a W pin of a frequency converter G1 are connected with one end of a thermal relay FR2, one end of a thermal relay FR3, one end of a thermal relay FR4 and one end of a thermal relay FR5, the other end of a thermal relay FR2 is connected with a # fan M2, the other end of a thermal relay FR3 is connected with a # fan M3, the other end of a thermal relay FR4 is connected with a # fan M4, and the other end of a thermal relay FR;

the other end of the breaker QF3 is connected with an R pin, an S pin and a T pin of a frequency converter G2, a Dl1 pin of a frequency converter G2 is connected with a switch of a relay KA4, a Dl4 pin of a frequency converter G1 is connected with a switch of a relay KA6, a U pin, a V pin and a W pin of a frequency converter G2 are connected with one end of a thermal relay FR6, one end of a thermal relay FR7, one end of a thermal relay FR8 and one end of a thermal relay FR9, the other end of the thermal relay FR6 is connected with a No. 5 fan M6, the other end of the thermal relay FR7 is connected with a No. 6 fan M7, the other end of the thermal relay FR8 is connected with a No. 7 fan M8, and the other;

the other end of the breaker QF4 is connected with one end of a contactor KM4, the other end of the contactor KM4 is connected with one end of a water tray heating resistor R1, one end of a water tray heating resistor R2 and one end of a water tray heating resistor R3, and the other end of the water tray heating resistor R1, the other end of the water tray heating resistor R2 and the other end of the water tray heating resistor R3 are connected with an N line of three power lines.

4. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 1, wherein: the CPU unit comprises a chip U1, the model of the chip U1 is SR60, a 1M pin in a Dla area of the chip U1 is connected with a power supply DC end, a4 pin in a Dla area of the chip U1 is connected with one end of a switch S1, the other end of the switch S1 is connected with 24V, and the part is used for low-voltage control of the press; the 5 feet of the Dla area of the chip U1 are connected with one end of a switch S2, and the other end of the switch S2 is connected with 24V, and the part is used for high-voltage control of the press; the 5 feet of the Dla area of the chip U1 are connected with one end of a switch S2, and the other end of the switch S2 is connected with 24V, and the part is used for high-voltage control of the press; the 6 feet of the Dla area of the chip U1 are connected with one end of a switch S3, the other end of the switch S3 is connected with 24V, and the part is used for press overload control; the 7 feet of the Dla area of the chip U1 are connected with one end of a switch S4, and the other end of the switch S4 is connected with 24V, and the part is used for oil level switch control;

the pin 0 of the Dlb area of the chip U1 is connected with one end of a switch S5, the other end of the switch S5 is connected with 24V, and the part is used for an oil pressure difference switch; the 1 pin of the Dlb area of the chip U1 is connected with one end of a switch S6, and the other end of the switch S6 is connected with 24V, and the part is used for protecting PTC in the machine; the 4-pin connection 24V in the Dlb area of the chip U1 is used for system phase sequence protection; the 5 feet of the Dlb area of the chip U1 is connected with one end of a switch S7, and the other end of the switch S7 is connected with 24V, and the part is used for a water flow switch; the 6 pins of the Dlb area of the chip U1 are connected with one end of a switch S8, and the other end of the switch S8 is connected with 24V, wherein the part is used for overloading the circulating pump; the 7 pins of the Dlb area of the chip U1 are connected with one end of a switch S9, and the other end of the switch S9 is connected with 24V, and the part is used for remote switching;

the pin 0 of the Dlc area of the chip U1 is connected with one end of a switch S10, the other end of the switch S10 is connected with 24V, and the part is used for external alarming; the 4-pin 24V in the Dlc region of the chip U1; the 5 feet of the Dlc area of the chip U1 are connected with one end of a switch S11, the other end of the switch S11 is connected with 24V, and the part is used for overloading the condensation fan; the 7 feet of the Dlc area of the chip U1 are connected with one end of a switch S12, the other end of the switch S12 is connected with 24V, and the part is used for phase sequence protection; the pin L1 in the DIe area of the chip U1 is connected with the positive electrode of the power supply, and the pin N in the DIe area of the chip U1 is connected with the ground.

5. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 4, wherein: the 1L pin, the 2L pin and the 3L pin in the DQa area of the chip U1 are connected with the anode of a power supply, the 1 pin in the DQa area of the chip U1 is connected with one end of a coil of a contactor KM4, the other end of the coil of the contactor KM4 is grounded, and the part is a 25% electromagnetic valve; the 2 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM5, the other end of the coil of the contactor KM5 is grounded, and the part is a 50% electromagnetic valve; the 3 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM6, the other end of the coil of the contactor KM6 is grounded, and the part is a 75% electromagnetic valve; the 5 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM7, the other end of the coil of the contactor KM7 is grounded, and the part is an intermediate relay KA 9; the 6 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM8, the other end of the coil of the contactor KM8 is grounded, and the part is an intermediate relay KA 10; the 7 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM9, and the other end of the coil of the contactor KM9 is grounded, and the part is an intermediate relay KA 11.

6. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 4, wherein: the pin 0 of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM10, the other end of the coil of the contactor KM10 is grounded, and the part is a liquid spraying electromagnetic valve; the 1 pin of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM11, and the other end of the coil of the contactor KM11 is grounded, and the part is an economizer valve; the 3 feet of the DQb area of the chip U1 are connected with one end of a coil of a contactor KM12, the other end of the coil of the contactor KM12 is grounded, and the part is a speed of the intermediate relay KA12 and a condensing fan; the 4 pins in the DQb area of the chip U1 are connected with one end of a bulb HL2, the other end of the bulb HL2 is grounded, and the part is a fault indication; the 5-pin of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM13, and the other end of the coil of the contactor KM13 is grounded, and the part is used for fault indication; the 4L pin in the DQb area of the chip U1 is connected with the positive electrode of a power supply;

the 5L pin and the 6L pin in the DQc area of the chip U1 are connected with the positive electrode of a power supply; a pin 1 in a DQc area of the chip U1 is connected with one end of a coil of a contactor KM14 and one end of a bulb HL3, the other end of the coil of the contactor KM14 and the other end of the bulb HL3 are grounded, and the part is used for indicating the operation of an intermediate relay KA13 and a circulating pump; the 2-pin in the DQc area of the chip U1 is connected with one end of a coil of a contactor KM15, the other end of the coil of the contactor KM15 is grounded, and the part is used for heating a water tray; the 3 feet of the DQc area of the chip U1 are connected with one end of a coil of a contactor KM16, the other end of the coil of the contactor KM16 is grounded, and the part is used for a liquid circuit electromagnetic valve; the 6 feet of the DQc area of the chip U1 are connected with one end of a coil of a contactor KM17, the other end of the coil of the contactor KM17 is grounded, and the part is used for two-stage speed of an intermediate relay and a condensing fan; the L + pin of the chip U1 is connected to 24V, and the M pin of the chip U1 is connected to ground.

7. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 1, wherein: the CPU unit also comprises an internal protection PTC, a pin L1 of the internal protection PTC is connected with a U line of a three-phase line, a pin L2 of the internal protection PTC is connected with a V line of the three-phase line, a pin L3 of the internal protection PTC is connected with a W line of the three-phase line, a pin L of the internal protection PTC is connected with a pin L of a 220V power supply, a pin N of the internal protection PTC is connected with a pin N of the 220V power supply, a pin 1 of the internal protection PTC is connected with one end of a resistor A, and the other end of the resistor A is connected with a pin 2 of the;

the CPU unit also comprises a liquid-spraying electric swelling module, wherein the L pin of the liquid-spraying electric swelling module is connected with the L pin of a 220V power supply, and the N pin of the liquid-spraying electric swelling module is connected with the N pin of the 220V power supply;

the CPU unit further comprises an electronic oil level switch, an L pin of the electronic oil level switch is connected with an L pin of a 220V power supply, and an N pin of the electronic oil level switch is connected with an N pin of the 220V power supply.

8. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 1, wherein: the analog quantity unit comprises an SCM-16 analog quantity module, wherein the pin l1 of the SCM-16 analog quantity module is connected with one end of a pressure gauge P1, the other end of the pressure gauge P1 is connected with 24V, and the pressure gauge is used for detecting the suction pressure; the 12 pin of the SCM-16 analog quantity module is connected with one end of a pressure gauge P2, and the other end of the pressure gauge P2 is connected with 24V, and the part is used for exhausting pressure; the 13 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P3, and the other end of the pressure gauge P3 is connected with 24V, and the part is used for medium-pressure; the 14 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P4, the other end of the pressure gauge P4 is connected with 24V, and the part is used for oil pressure; the 15 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P5, the other end of the pressure gauge P5 is connected with 24V, and the part is used for a dew point sensor;

the X0 pin of the SCM-16 analog quantity module is connected with the 0 pin of the DIa area of the chip U1, the X1 pin of the SCM-16 analog quantity module is connected with the 1 pin of the DIa area of the chip U1, the T1 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R11, the other end of the temperature sensor R11 is connected with the COM pin, and the part is used for outputting water temperature; a T2 pin of the SCM-16 analog module is connected with one end of a temperature sensor R12, the other end of the temperature sensor R12 is connected with a COM pin, and the COM pin is used for returning water temperature; the T3 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R13, the other end of the temperature sensor R13 is connected with a COM pin, and the COM pin is used for exhaust temperature; the T4 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R14, the other end of the temperature sensor R14 is connected with a COM pin, and the COM pin is used for fin temperature; the T5 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R15, the other end of the temperature sensor R15 is connected with a COM pin, and the COM pin is used for the liquid jet temperature of a press; the T8 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R16, and the other end of the temperature sensor R16 is connected with a COM pin, and the COM pin is used for ambient temperature.

9. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 1, wherein: the communication module comprises a GRM202 communication terminal, the GRM202 communication terminal is connected with the expansion module unit, a GND pin of 24VDC of the GRM202 communication terminal is connected with a V-pin of the switch electric eye, and a VCC pin of 24VDC of the GRM202 communication terminal is connected with a V + pin of the switch electric eye.

10. The control system of the-25 ℃ ultra-low temperature noise-reduction screw air source heat pump unit as claimed in claim 1, wherein: the model of the electronic expansion valve module is EKE1B, the COM1 pin of the electronic expansion valve module is connected with the 2 pin of an air suction pressure sensor AKS32R, the +5V pin of the electronic expansion valve module is connected with the 1 pin of an air suction pressure sensor AKS32R, the 3 pin of the air suction pressure sensor AKS32R is connected with the AI3 pin of the electronic expansion valve module, the DI1 pin of the electronic expansion valve module is connected with one end of a switch KM1, the other end of the switch KM1 is connected with the COM2 end of the electronic expansion valve module, the AI2 pin of the electronic expansion valve module is connected with one end of an air suction temperature sensor EKS221, the other end of the air suction temperature sensor EKS221 is connected with the COM3 pin of the electronic expansion valve module, the A, a pin B1 of the electronic expansion valve module and a pin B2 of the electronic expansion valve module are connected with a main-path electronic expansion valve, and a pin D-and a pin D + of the electronic expansion valve module are connected with expansion units.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control system of a screw air source heat pump unit capable of reducing noise at a temperature of-25 ℃.

Background

The environment temperature in the north is low, and low-temperature heating equipment is needed; in order to protect the environment, save energy and save space, people use the air source heat pump unit for centralized heating, and can prevent the environment from being polluted for the second time by using clean energy. However, when the screw type press operates, the noise of the fan and the compressor is larger than that of the vortex type module unit, and higher requirements are provided for places with higher requirements on noise, such as communities, office buildings and the like.

Disclosure of Invention

In order to solve the problems, the invention provides a control system of a screw air source heat pump unit capable of reducing noise at the ultralow temperature of-25 ℃, solves the problem of overlarge noise generated by the air source heat pump unit, and realizes the low-noise effect during heating of the air source heat pump unit.

In order to solve the technical problems, the invention adopts the following technical scheme:

a control system of a screw air source heat pump unit capable of reducing noise at the temperature of-25 ℃ comprises a fan control module, a PLC module, a communication module and an electronic expansion valve module, wherein the PLC module comprises a CPU unit, an analog quantity unit and an expansion module unit, and the communication module and the electronic expansion valve module are connected with the PLC module.

Further, the fan control module comprises an open-phase sequence protector XJ3-D, the open-phase sequence protector XJ3-D is connected with a U line, a V line and a W line of a three-phase power line, the U line, the V line and the W line of the three-phase power line are connected with one end of a breaker QF1, the other end of the breaker QF1 is connected with one end of a breaker QF2, one end of a breaker QF3, one end of a breaker QF4, one end of a contactor KM1 switch and one end of a contactor KM3 switch, the other end of the contactor KM1 switch is connected with one end of a thermal relay FR1, the other end of the thermal relay FR1 is connected with one end of a press M1, and the other end of the press M1 is connected with the.

Furthermore, the other end of the breaker QF2 is connected with an R pin, an S pin and a T pin of a frequency converter G1, a Dl1 pin of a frequency converter G1 is connected with a switch of a relay KA4, a Dl4 pin of a frequency converter G1 is connected with a switch of a relay KA6, a U pin, a V pin and a W pin of a frequency converter G1 are connected with one end of a thermal relay FR2, one end of a thermal relay FR3, one end of a thermal relay FR4 and one end of a thermal relay FR5, the other end of a thermal relay FR2 is connected with a # fan M2, the other end of a thermal relay FR3 is connected with a # fan M3, the other end of a thermal relay FR4 is connected with a # fan M4, and the other end of a thermal relay FR5 is connected;

the other end of the breaker QF3 is connected with an R pin, an S pin and a T pin of a frequency converter G2, a Dl1 pin of a frequency converter G2 is connected with a switch of a relay KA4, a Dl4 pin of a frequency converter G1 is connected with a switch of a relay KA6, a U pin, a V pin and a W pin of a frequency converter G2 are connected with one end of a thermal relay FR6, one end of a thermal relay FR7, one end of a thermal relay FR8 and one end of a thermal relay FR9, the other end of the thermal relay FR6 is connected with a No. 5 fan M6, the other end of the thermal relay FR7 is connected with a No. 6 fan M7, the other end of the thermal relay FR8 is connected with a No. 7 fan M8, and the other;

the other end of the breaker QF4 is connected with one end of a contactor KM4, the other end of the contactor KM4 is connected with one end of a water tray heating resistor R1, one end of the water tray heating resistor R2 and one end of a water tray heating resistor R3, and the other end of the water tray heating resistor R1, the other end of the water tray heating resistor R2 and the other end of the water tray heating resistor R3 are connected with an N line of a three-phase power line.

Further, the CPU unit comprises a chip U1, the model of the chip U1 is SR60, a power supply DC end is connected to a pin 1M in a region Dla of the chip U1, one end of a switch S1 is connected to a pin 4 in a region Dla of the chip U1, the other end of the switch S1 is connected with 24V, and the part is used for low-voltage control of the press; the 5 feet of the Dla area of the chip U1 are connected with one end of a switch S2, and the other end of the switch S2 is connected with 24V, and the part is used for high-voltage control of the press; the 5 feet of the Dla area of the chip U1 are connected with one end of a switch S2, and the other end of the switch S2 is connected with 24V, and the part is used for high-voltage control of the press; the 6 feet of the Dla area of the chip U1 are connected with one end of a switch S3, the other end of the switch S3 is connected with 24V, and the part is used for press overload control; the 7 feet of the Dla area of the chip U1 are connected with one end of a switch S4, and the other end of the switch S4 is connected with 24V, and the part is used for oil level switch control;

the pin 0 of the Dlb area of the chip U1 is connected with one end of a switch S5, the other end of the switch S5 is connected with 24V, and the part is used for an oil pressure difference switch; the 1 pin of the Dlb area of the chip U1 is connected with one end of a switch S6, and the other end of the switch S6 is connected with 24V, and the part is used for protecting PTC in the machine; the 4-pin connection 24V in the Dlb area of the chip U1 is used for system phase sequence protection; the 5 feet of the Dlb area of the chip U1 is connected with one end of a switch S7, and the other end of the switch S7 is connected with 24V, and the part is used for a water flow switch; the 6 pins of the Dlb area of the chip U1 are connected with one end of a switch S8, and the other end of the switch S8 is connected with 24V, wherein the part is used for overloading the circulating pump; the 7 pins of the Dlb area of the chip U1 are connected with one end of a switch S9, and the other end of the switch S9 is connected with 24V, and the part is used for remote switching;

the pin 0 of the Dlc area of the chip U1 is connected with one end of a switch S10, the other end of the switch S10 is connected with 24V, and the part is used for external alarming; the 4-pin 24V in the Dlc region of the chip U1; the 5 feet of the Dlc area of the chip U1 are connected with one end of a switch S11, the other end of the switch S11 is connected with 24V, and the part is used for overloading the condensation fan; the 7 feet of the Dlc area of the chip U1 are connected with one end of a switch S12, the other end of the switch S12 is connected with 24V, and the part is used for phase sequence protection; the pin L1 in the DIe area of the chip U1 is connected with the positive electrode of the power supply, and the pin N in the DIe area of the chip U1 is connected with the ground.

Furthermore, the 1L pin, the 2L pin and the 3L pin in the DQa area of the chip U1 are connected with the positive electrode of a power supply, the 1 pin in the DQa area of the chip U1 is connected with one end of a coil of a contactor KM4, the other end of the coil of the contactor KM4 is grounded, and the part is a 25% electromagnetic valve; the 2 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM5, the other end of the coil of the contactor KM5 is grounded, and the part is a 50% electromagnetic valve; the 3 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM6, the other end of the coil of the contactor KM6 is grounded, and the part is a 75% electromagnetic valve; the 5 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM7, the other end of the coil of the contactor KM7 is grounded, and the part is an intermediate relay KA 9; the 6 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM8, the other end of the coil of the contactor KM8 is grounded, and the part is an intermediate relay KA 10; the 7 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM9, and the other end of the coil of the contactor KM9 is grounded, and the part is an intermediate relay KA 11.

Furthermore, a pin 0 in a DQb area of the chip U1 is connected with one end of a coil of a contactor KM10, and the other end of the coil of the contactor KM10 is grounded, and the part is a liquid injection electromagnetic valve; the 1 pin of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM11, and the other end of the coil of the contactor KM11 is grounded, and the part is an economizer valve; the 3 feet of the DQb area of the chip U1 are connected with one end of a coil of a contactor KM12, the other end of the coil of the contactor KM12 is grounded, and the part is a speed of the intermediate relay KA12 and a condensing fan; the 4 pins in the DQb area of the chip U1 are connected with one end of a bulb HL2, the other end of the bulb HL2 is grounded, and the part is a fault indication; the 5-pin of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM13, and the other end of the coil of the contactor KM13 is grounded, and the part is used for fault indication; the 4L pin in the DQb area of the chip U1 is connected with the positive electrode of a power supply;

the 5L pin and the 6L pin in the DQc area of the chip U1 are connected with the positive electrode of a power supply; a pin 1 in a DQc area of the chip U1 is connected with one end of a coil of a contactor KM14 and one end of a bulb HL3, the other end of the coil of the contactor KM14 and the other end of the bulb HL3 are grounded, and the part is used for indicating the operation of an intermediate relay KA13 and a circulating pump; the 2-pin in the DQc area of the chip U1 is connected with one end of a coil of a contactor KM15, the other end of the coil of the contactor KM15 is grounded, and the part is used for heating a water tray; the 3 feet of the DQc area of the chip U1 are connected with one end of a coil of a contactor KM16, the other end of the coil of the contactor KM16 is grounded, and the part is used for a liquid circuit electromagnetic valve; the 6 feet of the DQc area of the chip U1 are connected with one end of a coil of a contactor KM17, the other end of the coil of the contactor KM17 is grounded, and the part is used for two-stage speed of an intermediate relay and a condensing fan; the L + pin of the chip U1 is connected to 24V, and the M pin of the chip U1 is connected to ground.

Further, the CPU unit also comprises an internal protection PTC, a pin L1 of the internal protection PTC is connected with a U line of a three-phase line, a pin L2 of the internal protection PTC is connected with a V line of the three-phase line, a pin L3 of the internal protection PTC is connected with a W line of the three-phase line, a pin L of the internal protection PTC is connected with a pin L of a 220V power supply, a pin N of the internal protection PTC is connected with a pin N of the 220V power supply, a pin 1 of the internal protection PTC is connected with one end of a resistor A, and the other end of the resistor A is connected with a pin 2 of the internal protection;

the CPU unit also comprises a liquid-spraying electric swelling module, wherein the L pin of the liquid-spraying electric swelling module is connected with the L pin of a 220V power supply, and the N pin of the liquid-spraying electric swelling module is connected with the N pin of the 220V power supply;

the CPU unit further comprises an electronic oil level switch, an L pin of the electronic oil level switch is connected with an L pin of a 220V power supply, and an N pin of the electronic oil level switch is connected with an N pin of the 220V power supply.

Furthermore, the analog quantity unit comprises an SCM-16 analog quantity module, wherein the I1 pin of the SCM-16 analog quantity module is connected with one end of a pressure gauge P1, and the other end of the pressure gauge P1 is connected with 24V, and the pressure gauge is used for detecting the suction pressure; the 12 pin of the SCM-16 analog quantity module is connected with one end of a pressure gauge P2, and the other end of the pressure gauge P2 is connected with 24V, and the part is used for exhausting pressure; the 13 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P3, and the other end of the pressure gauge P3 is connected with 24V, and the part is used for medium-pressure; the 14 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P4, the other end of the pressure gauge P4 is connected with 24V, and the part is used for oil pressure; the 15 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P5, the other end of the pressure gauge P5 is connected with 24V, and the part is used for a dew point sensor;

the X0 pin of the SCM-16 analog quantity module is connected with the 0 pin of the DIa area of the chip U1, the X1 pin of the SCM-16 analog quantity module is connected with the 1 pin of the DIa area of the chip U1, the T1 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R11, the other end of the temperature sensor R11 is connected with the COM pin, and the part is used for outputting water temperature; a T2 pin of the SCM-16 analog module is connected with one end of a temperature sensor R12, the other end of the temperature sensor R12 is connected with a COM pin, and the COM pin is used for returning water temperature; the T3 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R13, the other end of the temperature sensor R13 is connected with a COM pin, and the COM pin is used for exhaust temperature; the T4 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R14, the other end of the temperature sensor R14 is connected with a COM pin, and the COM pin is used for fin temperature; the T5 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R15, the other end of the temperature sensor R15 is connected with a COM pin, and the COM pin is used for the liquid jet temperature of a press; the T8 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R16, and the other end of the temperature sensor R16 is connected with a COM pin, and the COM pin is used for ambient temperature.

Further, the communication module comprises a GRM202 communication terminal, the GRM202 communication terminal is connected with the expansion module unit, a GND pin of 24VDC of the GRM202 communication terminal is connected with a V-pin of the switch electric eye, and a VCC pin of 24VDC of the GRM202 communication terminal is connected with a V + pin of the switch electric eye.

Furthermore, the model of the electronic expansion valve module is EKE1B, COM1 pin of the electronic expansion valve module is connected with 2 pin of an air suction pressure sensor AKS32R, +5V pin of the electronic expansion valve module is connected with 1 pin of an air suction pressure sensor AKS32R, 3 pin of the air suction pressure sensor AKS32R is connected with AI3 pin of the electronic expansion valve module, DI1 pin of the electronic expansion valve module is connected with one end of a switch KM1, the other end of the switch KM1 is connected with COM2 end of the electronic expansion valve module, AI2 pin of the electronic expansion valve module is connected with one end of an air suction temperature sensor EKS221, the other end of the air suction temperature sensor EKS221 is connected with COM3 pin of the electronic expansion valve module, A1 pin of the electronic expansion valve module and A2, a pin B1 of the electronic expansion valve module and a pin B2 of the electronic expansion valve module are connected with a main-path electronic expansion valve, and a pin D-and a pin D + of the electronic expansion valve module are connected with expansion units.

By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:

the invention has been carried on the improvement of three aspects, the control system of the unit has carried on the big upgrade, the fan uses the small-scale fan on the basis of not changing the blast volume, increase the number of the fan, and adopt the frequency conversion operation, the bottom box and compressor all seal the amortization, raise the distance between heat exchange fin and the box, in order to enter the wind, through the above-mentioned measure, the unit noise is reduced to 60 decibels from 83 decibels, reach the requirement of the user to the noise, has solved the problem that the noise that the air source heat pump unit produces is too big, have realized the low noise effect when the air source heat pump unit heats.

Drawings

In order to more clearly illustrate this embodiment or the prior art, reference will now be made briefly to the drawings that are needed in this embodiment or the prior art description. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic system structure of the unit of the present invention;

FIG. 2 is a schematic diagram of a fan control module of the assembly of the present invention;

FIG. 3 is a schematic diagram of a CPU unit of the set PLC module of the present invention;

FIG. 4 is a schematic diagram of an SCM-16 analog module of the PLC module of the plant of the present invention;

FIG. 5 is a schematic diagram of an expansion module of the set PLC module of the present invention;

FIG. 6 is a schematic diagram of a GRM202 module of the unit PLC module of the present invention;

FIG. 7 is a schematic diagram of an electronic expansion valve module of the PLC heat control system of the unit of the present invention;

in the figure: the system comprises an outdoor fan 1, a fin heat exchanger 2, a liquid storage 3, a compressor 4, an oil separator 5, an electronic expansion valve 6, a falling film heat exchanger 7 and an air conditioner terminal 8.

Detailed Description

In an embodiment, as shown in fig. 1, the ultralow-temperature-at-25 ℃ noise-reduction screw air source heat pump unit comprises a fin heat exchanger 2 and a falling film heat exchanger 7, wherein an outdoor fan 1 is installed on one side of the fin heat exchanger 2, an air inlet is formed in the other side of the fin heat exchanger 2, the fin heat exchanger 2 is connected with one end of an electronic expansion valve 6 and one end of a liquid reservoir 3, the other end of the liquid reservoir 3 is connected with one end of a compressor 4, the other end of the compressor 4 is connected with an oil separator 5, the other ends of the electronic expansion valve 6 and the oil separator 5 are connected with the.

As shown in fig. 2, the control system of the-25 ℃ ultralow-temperature noise-reducing screw air source heat pump unit comprises a fan control module, the fan control module comprises a phase-failure phase sequence protector XJ3-D, the phase-failure phase sequence protector XJ3-D is connected with a U line, a V line and a W line of a three-phase power line, the U line, the V line and the W line of the three-phase power line are connected with one end of a breaker QF1, the other end of the breaker QF1 is connected with one end of a breaker QF2, one end of a breaker QF3, one end of a breaker QF4, one end of a contactor KM1 switch and one end of a contactor KM3 switch, the other end of the contactor KM1 switch is connected with one end of a thermal relay FR1, the other end of the thermal relay FR1 is connected with one end of a press M1, and the other.

The other end of the breaker QF2 is connected with an R pin, an S pin and a T pin of a frequency converter G1, a Dl1 pin of a frequency converter G1 is connected with a switch of a relay KA4, a Dl4 pin of a frequency converter G1 is connected with a switch of a relay KA6, a U pin, a V pin and a W pin of a frequency converter G1 are connected with one end of a thermal relay FR2, one end of a thermal relay FR3, one end of a thermal relay FR4 and one end of a thermal relay FR5, the other end of the thermal relay FR2 is connected with a # fan M2, the other end of the thermal relay FR3 is connected with a # fan M3, the other end of the thermal relay FR4 is connected with a # fan M4, and the other end of the thermal relay FR.

The other end of the breaker QF3 is connected with an R pin, an S pin and a T pin of a frequency converter G2, a Dl1 pin of a frequency converter G2 is connected with a switch of a relay KA4, a Dl4 pin of a frequency converter G1 is connected with a switch of a relay KA6, a U pin, a V pin and a W pin of the frequency converter G2 are connected with one end of a thermal relay FR6, one end of a thermal relay FR7, one end of a thermal relay FR8 and one end of a thermal relay FR9, the other end of the thermal relay FR6 is connected with a 5# fan M6, the other end of the thermal relay FR7 is connected with a 6# fan M7, the other end of the thermal relay FR8 is connected with a 7# fan M8, and the other end of the.

The other end of the breaker QF4 is connected with one end of a contactor KM4, the other end of the contactor KM4 is connected with one end of a water tray heating resistor R1, one end of the water tray heating resistor R2 and one end of a water tray heating resistor R3, and the other end of the water tray heating resistor R1, the other end of the water tray heating resistor R2 and the other end of the water tray heating resistor R3 are connected with an N line of a three-phase power line.

As shown in fig. 3, the control system further comprises a PLC module, the PLC module comprises a CPU unit, the CPU unit comprises a chip U1, the model of the chip U1 is SR60, a power supply DC terminal is connected to a pin 1M in a region Dla of the chip U1, a pin 4 in a region Dla of the chip U1 is connected to one end of a switch S1, and the other end of the switch S1 is connected to 24V, which is used for low-voltage control of the press; the 5 feet of the Dla area of the chip U1 are connected with one end of a switch S2, and the other end of the switch S2 is connected with 24V, and the part is used for high-voltage control of the press; the 5 feet of the Dla area of the chip U1 are connected with one end of a switch S2, and the other end of the switch S2 is connected with 24V, and the part is used for high-voltage control of the press; the 6 feet of the Dla area of the chip U1 are connected with one end of a switch S3, the other end of the switch S3 is connected with 24V, and the part is used for press overload control; the 7 feet of Dla area of the chip U1 are connected with one end of a switch S4, and the other end of the switch S4 is connected with 24V, and the part is used for oil level switch control.

The pin 0 of the Dlb area of the chip U1 is connected with one end of a switch S5, the other end of the switch S5 is connected with 24V, and the part is used for an oil pressure difference switch; the 1 pin of the Dlb area of the chip U1 is connected with one end of a switch S6, and the other end of the switch S6 is connected with 24V, and the part is used for protecting PTC in the machine; the 4-pin connection 24V in the Dlb area of the chip U1 is used for system phase sequence protection; the 5 feet of the Dlb area of the chip U1 is connected with one end of a switch S7, and the other end of the switch S7 is connected with 24V, and the part is used for a water flow switch; the 6 pins of the Dlb area of the chip U1 are connected with one end of a switch S8, and the other end of the switch S8 is connected with 24V, wherein the part is used for overloading the circulating pump; the 7 pins of the Dlb area of the chip U1 are connected with one end of a switch S9, and the other end of the switch S9 is connected with 24V, and the part is used for remote switching.

The pin 0 of the Dlc area of the chip U1 is connected with one end of a switch S10, the other end of the switch S10 is connected with 24V, and the part is used for external alarming; the 4-pin 24V in the Dlc region of the chip U1; the 5 feet of the Dlc area of the chip U1 are connected with one end of a switch S11, the other end of the switch S11 is connected with 24V, and the part is used for overloading the condensation fan; the 7 feet of the Dlc area of the chip U1 are connected with one end of a switch S12, the other end of the switch S12 is connected with 24V, and the part is used for phase sequence protection; the pin L1 in the DIe area of the chip U1 is connected with the positive electrode of the power supply, and the pin N in the DIe area of the chip U1 is connected with the ground.

The 1L pin, the 2L pin and the 3L pin in the DQa area of the chip U1 are connected with the anode of a power supply, the 1 pin in the DQa area of the chip U1 is connected with one end of a coil of a contactor KM4, the other end of the coil of the contactor KM4 is grounded, and the part is a 25% electromagnetic valve; the 2 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM5, the other end of the coil of the contactor KM5 is grounded, and the part is a 50% electromagnetic valve; the 3 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM6, the other end of the coil of the contactor KM6 is grounded, and the part is a 75% electromagnetic valve; the 5 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM7, the other end of the coil of the contactor KM7 is grounded, and the part is an intermediate relay KA 9; the 6 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM8, the other end of the coil of the contactor KM8 is grounded, and the part is an intermediate relay KA 10; the 7 feet of the DQa area of the chip U1 are connected with one end of a coil of a contactor KM9, and the other end of the coil of the contactor KM9 is grounded, and the part is an intermediate relay KA 11.

The pin 0 of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM10, the other end of the coil of the contactor KM10 is grounded, and the part is a liquid spraying electromagnetic valve; the 1 pin of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM11, and the other end of the coil of the contactor KM11 is grounded, and the part is an economizer valve; the 3 feet of the DQb area of the chip U1 are connected with one end of a coil of a contactor KM12, the other end of the coil of the contactor KM12 is grounded, and the part is a speed of the intermediate relay KA12 and a condensing fan; the 4 pins in the DQb area of the chip U1 are connected with one end of a bulb HL2, the other end of the bulb HL2 is grounded, and the part is a fault indication; the 5-pin of the DQb area of the chip U1 is connected with one end of a coil of a contactor KM13, and the other end of the coil of the contactor KM13 is grounded, and the part is used for fault indication; the 4L pin in the DQb area of the chip U1 is connected with the positive electrode of the power supply.

The 5L pin and the 6L pin in the DQc area of the chip U1 are connected with the positive electrode of a power supply; a pin 1 in a DQc area of the chip U1 is connected with one end of a coil of a contactor KM14 and one end of a bulb HL3, the other end of the coil of the contactor KM14 and the other end of the bulb HL3 are grounded, and the part is used for indicating the operation of an intermediate relay KA13 and a circulating pump; the 2-pin in the DQc area of the chip U1 is connected with one end of a coil of a contactor KM15, the other end of the coil of the contactor KM15 is grounded, and the part is used for heating a water tray; the 3 feet of the DQc area of the chip U1 are connected with one end of a coil of a contactor KM16, the other end of the coil of the contactor KM16 is grounded, and the part is used for a liquid circuit electromagnetic valve; the 6 feet of the DQc area of the chip U1 are connected with one end of a coil of a contactor KM17, the other end of the coil of the contactor KM17 is grounded, and the part is used for two-stage speed of an intermediate relay and a condensing fan; the L + pin of the chip U1 is connected to 24V, and the M pin of the chip U1 is connected to ground.

The CPU unit further comprises an internal protection PTC, a pin L1 of the internal protection PTC is connected with a U line of a three-phase line, a pin L2 of the internal protection PTC is connected with a V line of the three-phase line, a pin L3 of the internal protection PTC is connected with a W line of the three-phase line, a pin L of the internal protection PTC is connected with a pin L of a 220V power supply, a pin N of the internal protection PTC is connected with a pin N of the 220V power supply, a pin 1 of the internal protection PTC is connected with one end of a resistor A, and the other end of the resistor A is connected with a pin 2 of the.

The CPU unit also comprises a liquid-spraying electric swelling module, the L pin of the liquid-spraying electric swelling module is connected with the L pin of a 220V power supply, and the N pin of the liquid-spraying electric swelling module is connected with the N pin of the 220V power supply.

The CPU unit further comprises an electronic oil level switch, an L pin of the electronic oil level switch is connected with an L pin of a 220V power supply, and an N pin of the electronic oil level switch is connected with an N pin of the 220V power supply.

As shown in fig. 4, the PLC module further includes an analog quantity unit, the analog quantity unit includes an SCM-16 analog quantity module, a pin l1 of the SCM-16 analog quantity module is connected with one end of a pressure gauge P1, and the other end of the pressure gauge P1 is connected with 24V, and the part is used for detecting the suction pressure; the 12 pin of the SCM-16 analog quantity module is connected with one end of a pressure gauge P2, and the other end of the pressure gauge P2 is connected with 24V, and the part is used for exhausting pressure; the 13 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P3, and the other end of the pressure gauge P3 is connected with 24V, and the part is used for medium-pressure; the 14 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P4, the other end of the pressure gauge P4 is connected with 24V, and the part is used for oil pressure; the 15 feet of the SCM-16 analog quantity module are connected with one end of a pressure gauge P5, and the other end of the pressure gauge P5 is connected with 24V, and the part is used for a dew point sensor.

The X0 pin of the SCM-16 analog quantity module is connected with the 0 pin of the DIa area of the chip U1, the X1 pin of the SCM-16 analog quantity module is connected with the 1 pin of the DIa area of the chip U1, the T1 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R11, the other end of the temperature sensor R11 is connected with the COM pin, and the part is used for outputting water temperature; a T2 pin of the SCM-16 analog module is connected with one end of a temperature sensor R12, the other end of the temperature sensor R12 is connected with a COM pin, and the COM pin is used for returning water temperature; the T3 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R13, the other end of the temperature sensor R13 is connected with a COM pin, and the COM pin is used for exhaust temperature; the T4 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R14, the other end of the temperature sensor R14 is connected with a COM pin, and the COM pin is used for fin temperature; the T5 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R15, the other end of the temperature sensor R15 is connected with a COM pin, and the COM pin is used for the liquid jet temperature of a press; the T8 pin of the SCM-16 analog quantity module is connected with one end of a temperature sensor R16, and the other end of the temperature sensor R16 is connected with a COM pin, and the COM pin is used for ambient temperature.

As shown in fig. 5, the PLC module further includes an extension module unit, where a pin 1 of the 24VDC of the extension module DM200A is connected to a pin V-of the switching electric eye, and a pin 2 of the 24VDC of the extension module is connected to a pin V + of the switching electric eye.

As shown in fig. 6, the control system further includes a communication module, the communication module includes a GRM202 communication terminal, the GRM202 communication terminal is connected to the expansion module unit, a GND pin of 24VDC of the GRM202 communication terminal is connected to a V-pin of the switching electric eye, and a VCC pin of 24VDC of the GRM202 communication terminal is connected to a V + pin of the switching electric eye.

As shown in fig. 7, the control system further includes an electronic expansion valve module, the electronic expansion valve module is EKE1B, the COM1 pin of the electronic expansion valve module is connected with 2 pins of an air suction pressure sensor AKS32R, the +5V pin of the electronic expansion valve module is connected with 1 pin of an air suction pressure sensor AKS32R, the 3 pin of the air suction pressure sensor AKS32R is connected with an AI3 pin of the electronic expansion valve module, the DI1 pin of the electronic expansion valve module is connected with one end of a switch KM1, the other end of the switch KM1 is connected with a COM2 end of the electronic expansion valve module, the AI2 pin of the electronic expansion valve module is connected with one end of an air suction temperature sensor EKS221, the other end of the air suction temperature sensor EKS221 is connected with a COM3 pin of the electronic expansion valve module, a1 pin of the electronic, a pin B1 of the electronic expansion valve module and a pin B2 of the electronic expansion valve module are connected with a main-path electronic expansion valve, and a pin D-and a pin D + of the electronic expansion valve module are connected with expansion units.

The invention adopts two aspects of improvement to realize the noise reduction effect:

firstly, the fans adopt small fans on the basis of not changing the air quantity, increase the number of the fans and adopt variable frequency operation;

and secondly, the bottom box body and the compressor are subjected to complete sealing and silencing treatment, and the distance is raised between the box body and the heat exchange fins so as to facilitate air inlet.

As shown in figure 2, the fan is changed into a plurality of small fans, and the frequency converter is used for controlling starting and stopping and two-stage speed control. The high speed is used in daytime, and the low speed is used in night.

As shown in fig. 4, dew point sensor has been increased on original control's basis, receive dew point temperature's restriction when changing frost, be higher than environment dew point temperature, then do not change frost, than time quantum and the segmentation of fin temperature frost of changing like this, reduce the number of times of changing frost, prevent the ice deposit of fin bottom, energy saving, the fast frequency conversion control of fan two-stage, the fan receives the control of ambient temperature and time, the motor power that single fan amount of wind diminishes, increase the number of fan, under the unchangeable condition of amount of wind, reuse frequency conversion opens and stops, the noise has been reduced, reduce the rotational speed of fan when ambient temperature is than higher, load according to needs at night, the fan press all reduces the rotational speed, the noise is littleer.

The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.